Pin-protector.



T. HAYASHI.

PIN PROTECTOR.

APPLICATION FILED MAR. 2. 1915.

Patented Nov. 2, 1915.

(June/wile:

COLUMBIA PLANOGRAPH co.,wAsH|Nu1'oN D c I 'on r V PIN-PROTECTOR.

Applicationfiled March 2, 1915 Serial No. 11,573.

a subject of the Emperor of Japan, residing at New. York, in thecountyof New York and State of New York, have invented new and usefulImprovements in Pin-Protectors, of which'the following is aspecification.

This invention contemplates the provision of a safety attachment forpins capable of being readily and easily associated with the pointed endthereof to obviate casual separation of thepin from the object to whichit is secured, as well as to prevent injury to persons coming in contactwith the same, and which may be easily removed when desired. In carryingout my invention I aim to provide a device of this character whichautomatic'ally grips the pin when the'parts are operatively associated,any outward pressure on the pin in an attempt to withdraw the same,serving to render the device more effective in its purpose, I V

Another object of the invention resides in the provision of a device ofthis character constructed to be renderedtemporarily inoperative topermit separation ofthe device from the pin when desired. 7

Other objects will appearas the nature of the invention is betterunderstood from the following description wherein the construction andarrangement of parts are more fully set forth.

In the drawing forming part of this application like numerals ofreference indicate similar parts in the several views wherein Figure 1is a longitudinal sectional view through the device showing the normalposition of parts' F ig; 2 is a perspective view of the plunger. Fig. 3is a transverse sectional view taken on line a-a of Fig. 1.

Fig. 4 is a longitudinal sectional view through the device showing thepositionof parts topermit release of the pin.

The device forming the subject matter of my invention comprises a casing5 which may be constructed of any suitable material and desiredformation. However as shown I in this particular instance the casing isdivided into compartments .6 and 7 respectively by means of thepartition 8, that portion of the casing defining the compartment 6 beingsubstantially of conical formation. The partition 8 is provided with acentral opening 9 through which the plunger 10 is slidably mounted, thelatter together with the balls 11 constituting a clutch adapted toSpecification of Letters Patent.

Patented Nov. 2, 1915.

automatically grip thepin 12,up on insertion of the same within thecasing in a manner presently'described. The plunger 10 is provided witha longitudinally extending bore 13 disposed in axial .alinement with thecone-shaped opening-in theend v a-11 1 4 of the casing. Encircling theplunger 101s a coil spring 15 having one terminal fixed to the flange 16at one end of the plunger, andits opposite end fixed to the partition 8,this s'rarns PA E T OFFIC v.

TOYOKICHI HAYASI-II, or YORK, N. Y.

spring operating to normally maintain the plunger in the position shownin Fig- 1. The flange 16 is channeled as at 17, and arranged within thischannel arethe balls 11.

Upon reference to Fig. 1 it will'be noted that, V A

these balls in normal position are confined between the flange 1,6 ofthe plunger and the end wall 14 of the casing, in such relative positionthat the space betweenthe balls is considerably less than the diameterof the pin 12. By reason of this construction it will be obviousthatwhen the pin is inserted .withinthe casing, the balls 11 and plunger 10are forced inwardly against the action of the coil spring 15 until theballs 11 separate the required distance to permit the pinto enter thebore 13 of the plunger, whereuponthe spring 15 operates to return theplunger and balls to normal position and into efiective engagement withthe pin. Theballs 11 during this operation are guided in their movementby the tapered walls of the casin 5, which direct the balls into thechannel 1 upon return movement of the plunger to operative position,whereby these balls are held in proper gripping relation. Theconstruction of the clutch is such that any out Ward pressure upon thepin inan effort to withdraw thesame from the casing only tends toincrease the gripping action ofv the clutchupon thepin. V r

Arranged within the compartment 7 is a tube 18 disposed at a right angleto the plunger 10 and closed at its lower end thereby. Positioned withinthe tube 18 is a coil spring 19 having one end bearing against thecasing 5 and its opposite end secured to the plate 21 which is mountedfor sliding movement within the tube. The plate 21 exerts pressureagainst the ball 22 normally I maintaining the latter in engagement withNOW When it is desired to remove the pin from the device, the pin isforced inwardly moving the plunger 10 and balls 11 to the positionindicated in Fig. i, and at which time the ball 22 Within the tube 18 isforced under action of the spring 19 Within the semicircular recess :28of the plunger 10,

temporarily locking the plunger in its adjusted position to permit thepin to be separated from the device by quickly Withdrawing the pin fromthe casing. Subsequent to the Withdrawal of the pin from the casing, thespring 15 operates to return the plunger 10 and the balls 11 to normalposition, this spring being much stronger than the spring 19overcomes-the resistance of the latter, and during the return movementof the plunger 10 the ball 22 is forced out of the recess 28 and Withinthe tube 18. As hereinaoove stated the terminals of the spring 15 aresecured to the partition 8, and flange 16 of the plunger, wherebytwisting or turning of the plunger 8 is obviated, and the recess 23 heldin proper position to travel directly beneath the open end of the tube18 upon adjustment of the plunger 10.

The bore 13 of the plunger is restricted at its=rear end as at 2% toprevent the pin from being passed through the opposite end of theplunger 10, and thereby protect the pointed end of the pin from beingblunted or otherwise injured by coming in contact with the casing 5;

- It is believed that from the foregoing description the nature andadvantages of the invention Will be readily apparent Without requiring amore extended explanation and therefore the same has been omitted.However I desire to have it understood that I do not limit myself to theprecise construction and arrangement of parts herein illustrated anddescribed, as various changes may be resorted to when desired as fallWithin the scope of the appended claims.

What is claimed is 1. A pin protector comprising a casing adaptedtoreceive said pin, a clutch movable longitudinally Within said casing forautomatic engagement With said pin, and means cooperating With saidclutch on a predetermined position thereof to render said clutchtemporarily inoperative to permit the pin to be Withdrawn from the casin2. A pin protector comprising a casing to receive the pin, a springpressed clutch arranged Within the casing and movable longitudinallythereof for automatic engagement with said pin, means for rendering saidclutch temporarily inoperative on a predetermined adjusted position ofthe clutch against tension of said spring, and said spring operating torelease said means and return said clutch to normal position.

A pin protector comprising a casing adapted to receive the pin, a clutcharranged therein for automatic engagement with said pin and including aspring pressed plunger, said plunger having a recess in one side tiereof, and a spring pressed locking element adapted to enter saidrecess on a predetermined adjusted position of the plunger totemporarily render saidclutch inoperative to permit the pin to beWithdrawn from the casing. 7

4-. A pin protector comprising a casing adapted to receive the pin, aclutch arranged therein for automatic engagement With said pin andincluding a plunger movable longitudinally thereof, a spring encirclingsaid plunger and normally maintaining the clutch in operative position,said plunger having a recess in one side thereof, a spring pressedlocking element adapted to enter said recess on a predetermined adjustedposition of the plunger to temporarilyrender said clutch inoperative topermit Withdrawal of the pin from the casing, and said first mentionedspring operating to return said clutch to normal position subsequent tothe separation of the pin therefrom.

In testimony whereof I aifix my signature in presence of two witnesses.

' TOYOKICHI HAYASHI.

Witnesses 1 JOHN D. DOUGLASS, AnNA V. DOYLE.

Copies of this patent may be obtained for five cents each,lay-addressing the fifl onunissioner of Patents,

Washington, D. 0. a

